The non‐indigenous Cryptozona siamensis is reported for the first time from Singapore. This terrestrial snail was discovered from
the site of a former plant nursery that borders the Central Catchment Nature Reserve, and is believed to have been accidentally
introduced through horticultural trade activities. Cryptozona siamensis is a potential plant pest and is known to be a host of the
parasite that causes human eosinophilic meningitis, a potentially life‐threatening condition. Urgent management to control or
eradicate the species is desired to curb its spread. Its distribution and status in Peninsular Malaysia is briefly discussed.